Offer only Device Code Flow on FreeBSD

[skillcoder]

Describe your changes

Issue ticket number and link

#2384

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)
• Extended the README / documentation, if necessary

[avg-I]

I am not sure what was the rationale for this change.
It broke my ability to login via a browser.

I am running netbird from command line (terminal application) in a FreeBSD desktop environment (KDE in my case).

[avg-I]

I looked at #2384, but I am not convinced.
NetBird on FreeBSD should provide the same experience as other platforms.
People who need to run NetBird in special environments (headless, etc) need to take extra steps to get their configuration.
But "common users" should get something working out of the box.

Please consider reverting.

[avg-I]

FWIW, command-line netbird 0.28.7 and 0.28.8 (with this change reverted) just work for me without any special patches.
I build netbird with simple commands like:

cd client
go build -o netbird -ldflags '-X github.com/netbirdio/netbird/version.version=0.28.8

That's it.

I understand that there is a lot of work going on to integrate NetBird into "appliances" like OPNSense.
I appreciate it, but please keep the desktop experience working.